Use of phytoplankton functional groups as a model of spatial and temporal patterns in reservoirs: a case study in a reservoir of central Brazil

Rodrigues, Luzia Cleide; Pivato, Bianca Mathias; Vieira, Ludgero Cardoso Galli; Scomparin, Vânia Mara Bovo; Bortolini, Jascieli Carla; Pineda Barbosa, Alfonso; Train, Sueli

Use of phytoplankton functional groups as a model of spatial and temporal patterns in reservoirs: a case study in a reservoir of central Brazil

Data

2018

Autores

Rodrigues, Luzia Cleide

Pivato, Bianca Mathias

Vieira, Ludgero Cardoso Galli

Scomparin, Vânia Mara Bovo

Bortolini, Jascieli Carla

Pineda Barbosa, Alfonso

Train, Sueli

Resumo

We analyzed the temporal (dry and rainy periods) and spatial (zones) phytoplankton biomass variation (FGs—functional groups) in a tropical reservoir, and determined the main drivers. We hypothesized that water flow negatively affects the FG–environment relationship because high flow promotes dispersal stochasticity. Our results indicated that the FG–environment relationship was affected mainly by the rainfall regime. Periods with intermediate precipitation showed greater predictability than periods with extreme precipitation. This suggests that the effect of stochastic processes on the phytoplankton community is more important in both the highest and lowest water flow, and deterministic processes are more important at intermediate flow. The longitudinal gradient of nutrients, light, and water-column mixing influenced the distribution of the FG biomass. The riverine zone showed high nutrient concentrations, low light availability, and a high biomass of organisms related to highly enriched systems (FG J—chlorophyceans) and shade-adapted taxa (FG S1—cyanobacteria). The lacustrine zone showed high light availability and a high biomass of heterocytous cyanobacteria (FGs SN and H1) and meroplanktonic diatoms (FG MP). The functional approach can be applied to understand the processes responsible for species coexistence and for the organization of aquatic ecosystems.

Palavras-chave

Planktonic algae, Indicators, STATICO, Impoundment

Citação

RODRIGUES, Luzia Cleide et al. Use of phytoplankton functional groups as a model of spatial and temporal patterns in reservoirs: a case study in a reservoir of central Brazil. Hydrobiologia, Berlim, v. 805, p. 147-161, 2018. DOI: 10.1007/s10750-017-3289-x. Disponível em: https://link.springer.com/article/10.1007/s10750-017-3289-x. Acesso em: 12 jun. 2023.